[Dovecot] Where are flags stored?

[Adam Pordzik]

Hello,

I don't now wheather this is IMAP or actually dovecot-specific, but I 
hope you people here knows about this at least: Where are flags like 
seen/unseen or e.g. message-priority stored?

My goal is to mark spam or other filtered by procmail as "seen", so that 
dovecot doesn't notify MUAs about new mail in IDLE mode.

Are there any mail-headers, so I can set these with procmail to 
accomplish that?

Thanks for help,

A